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/* $OpenBSD: imxiomuxc.c,v 1.1 2018/04/02 17:45:38 patrick Exp $ */
/*
* Copyright (c) 2013 Patrick Wildt <patrick@blueri.se>
* Copyright (c) 2016 Mark Kettenis <kettenis@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/evcount.h>
#include <sys/socket.h>
#include <sys/timeout.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pinctrl.h>
#include <dev/ofw/fdt.h>
#define IOMUX_CONFIG_SION (1 << 4)
#define IMX_PINCTRL_NO_PAD_CTL (1 << 31)
#define IMX_PINCTRL_SION (1 << 30)
struct imxiomuxc_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
struct imxiomuxc_softc *imxiomuxc_sc;
int imxiomuxc_match(struct device *, void *, void *);
void imxiomuxc_attach(struct device *, struct device *, void *);
struct cfattach imxiomuxc_ca = {
sizeof (struct imxiomuxc_softc), imxiomuxc_match, imxiomuxc_attach
};
struct cfdriver imxiomuxc_cd = {
NULL, "imxiomuxc", DV_DULL
};
int imxiomuxc_pinctrl(uint32_t, void *);
int
imxiomuxc_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return (OF_is_compatible(faa->fa_node, "fsl,imx6q-iomuxc") ||
OF_is_compatible(faa->fa_node, "fsl,imx6dl-iomuxc") ||
OF_is_compatible(faa->fa_node, "fsl,imx6sl-iomuxc") ||
OF_is_compatible(faa->fa_node, "fsl,imx6sx-iomuxc") ||
OF_is_compatible(faa->fa_node, "fsl,imx6ul-iomuxc"));
}
void
imxiomuxc_attach(struct device *parent, struct device *self, void *aux)
{
struct imxiomuxc_softc *sc = (struct imxiomuxc_softc *)self;
struct fdt_attach_args *faa = aux;
KASSERT(faa->fa_nreg >= 1);
sc->sc_iot = faa->fa_iot;
if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
faa->fa_reg[0].size, 0, &sc->sc_ioh))
panic("%s: bus_space_map failed!", __func__);
pinctrl_register(faa->fa_node, imxiomuxc_pinctrl, sc);
imxiomuxc_sc = sc;
printf("\n");
}
int
imxiomuxc_pinctrl(uint32_t phandle, void *cookie)
{
struct imxiomuxc_softc *sc = cookie;
char name[31];
uint32_t *pins;
int npins;
int node;
int len;
int i;
node = OF_getnodebyphandle(phandle);
if (node == 0)
return -1;
OF_getprop(node, "name", name, sizeof(name));
name[sizeof(name) - 1] = 0;
len = OF_getproplen(node, "fsl,pins");
if (len <= 0)
return -1;
pins = malloc(len, M_TEMP, M_WAITOK);
OF_getpropintarray(node, "fsl,pins", pins, len);
npins = len / (6 * sizeof(uint32_t));
for (i = 0; i < npins; i++) {
uint32_t mux_reg = pins[6 * i + 0];
uint32_t conf_reg = pins[6 * i + 1];
uint32_t input_reg = pins[6 * i + 2];
uint32_t mux_val = pins[6 * i + 3];
uint32_t conf_val = pins[6 * i + 5];
uint32_t input_val = pins[6 * i + 4];
uint32_t val;
/* Set MUX mode. */
if (conf_val & IMX_PINCTRL_SION)
mux_val |= IOMUX_CONFIG_SION;
bus_space_write_4(sc->sc_iot, sc->sc_ioh, mux_reg, mux_val);
/* Set PAD config. */
if ((conf_val & IMX_PINCTRL_NO_PAD_CTL) == 0)
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
conf_reg, conf_val);
/* Set input select. */
if ((input_val >> 24) == 0xff) {
/*
* Magic value used to clear or set specific
* bits in the general purpose registers.
*/
uint8_t shift = (input_val >> 16) & 0xff;
uint8_t width = (input_val >> 8) & 0xff;
uint32_t clr = ((1 << width) - 1) << shift;
uint32_t set = (input_val & 0xff) << shift;
val = bus_space_read_4(sc->sc_iot, sc->sc_ioh,
input_reg);
val &= ~clr;
val |= set;
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
input_reg, val);
} else if (input_reg != 0) {
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
input_reg, input_val);
}
}
free(pins, M_TEMP, len);
return 0;
}
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